WO2020123981A1 - Appareil support d'échelle - Google Patents

Appareil support d'échelle Download PDF

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Publication number
WO2020123981A1
WO2020123981A1 PCT/US2019/066291 US2019066291W WO2020123981A1 WO 2020123981 A1 WO2020123981 A1 WO 2020123981A1 US 2019066291 W US2019066291 W US 2019066291W WO 2020123981 A1 WO2020123981 A1 WO 2020123981A1
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WO
WIPO (PCT)
Prior art keywords
ladder
support
friction
segment
bracket
Prior art date
Application number
PCT/US2019/066291
Other languages
English (en)
Inventor
Jason Coulter
Original Assignee
Jason Coulter
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jason Coulter filed Critical Jason Coulter
Priority to US17/413,309 priority Critical patent/US20220018189A1/en
Publication of WO2020123981A1 publication Critical patent/WO2020123981A1/fr

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Classifications

    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C1/00Ladders in general
    • E06C1/02Ladders in general with rigid longitudinal member or members
    • E06C1/38Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
    • E06C1/397Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders characterised by having wheels, rollers, or runners
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C1/00Ladders in general
    • E06C1/02Ladders in general with rigid longitudinal member or members
    • E06C1/14Ladders capable of standing by themselves
    • E06C1/16Ladders capable of standing by themselves with hinged struts which rest on the ground
    • E06C1/18Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as ladders
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C1/00Ladders in general
    • E06C1/02Ladders in general with rigid longitudinal member or members
    • E06C1/38Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C7/00Component parts, supporting parts, or accessories
    • E06C7/42Ladder feet; Supports therefor
    • E06C7/44Means for mounting ladders on uneven ground
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C7/00Component parts, supporting parts, or accessories
    • E06C7/42Ladder feet; Supports therefor
    • E06C7/46Non-skid equipment

Definitions

  • the present disclosure generally relates to ladders and the stabilization and mobilization thereof.
  • Ladders support a user thereon such that the user may perform various tasks from an elevated location.
  • Ladders are typically top-heavy when a user is standing thereon. The top-heaviness can cause wobbling or“walking” of the ladder (e.g., rocking from side to side while the user is on the ladder).
  • the ladder may also be needed in numerous floor surfaces (generally referred to herein as an“underlying surface”). Thus, stability of the ladder is a consideration. Many existing ladders lack proper stability to support a user thereon. Further, to move a ladder, a user must typically lift the ladder off the underlying surface and carry the ladder to a desired location or orientation.
  • Embodiments of the invention solve the above-mentioned problem by providing a ladder support apparatus.
  • the ladder support attachment is configured to enhance the mobility, the stability, and the load support of a ladder.
  • Embodiments of the present invention improve support and stability of the ladder by providing improved contact of the legs with the ground surface. Such improved contact of the legs reduces wobble of the ladder during use and inhibits“walking” of the ladder, which is a known problem for standard ladders.
  • the ladder support attachment may be configured for use with an A-frame type ladder (e.g., a 1A or 1AA step ladder).
  • the ladder support attachment may be used on a front step ladder, which includes steps on its front side (i.e.
  • the ladder support attachment may be universal, such that it may be used with various other ladder types (e.g., multipurpose ladders, articulated ladders, platform ladders, step stools, etc).
  • the ladder support attachment may be configured to be used on ladders of various sizes, such as 8, 10, or 12 foot ladders (or even larger/smaller ladders).
  • the inventive ladders support attachment is configured to be universal, such that the ladder support attachment can be used with generally any type of ladder type, ladder size, and/or ladder brand, and may be configured to be supplied as a standard component with ladders as sold from a manufacturer.
  • a first embodiment of the invention is generally directed to a ladder support apparatus for providing support and stability to a ladder, said ladder support apparatus comprising a bracket, a friction-reducing segment, and a friction-inducing segment.
  • the bracket is configured to be secured to a leg of the ladder.
  • the friction-inducing segment is secured to the bracket and configured to interface with an underlying surface when the ladder support apparatus is in a default orientation relative to the underlying surface.
  • the friction-reducing segment is secured to the bracket and configured to interface with the underlying surface when the ladder support apparatus is in an angled orientation relative to the underlying surface.
  • a second embodiment of the invention is generally directed to ladder support apparatus for providing support and stability to a ladder, said ladder support apparatus comprising a bracket, a friction-reducing segment, and a friction-inducing segment.
  • the bracket is configured to be secured to a leg of the ladder, and includes a lateral support plate, a first sidewall, and a second sidewall.
  • the lateral support plate is configured to receive a foot of the leg of the ladder thereon.
  • the first sidewall and the second sidewall each extend downward from the lateral support plate.
  • the friction-inducing segment is secured to the bracket and configured to interface with an underlying surface when the ladder support apparatus is in a default orientation relative to the underlying surface.
  • the friction-reducing segment is secured to the bracket and configured to interface with the underlying surface when the ladder support apparatus is in an angled orientation relative to the underlying surface.
  • a third embodiment of the invention is generally directed to a ladder support system for providing support and stability to a ladder.
  • the ladder includes a set of primary legs and a set of support legs.
  • the ladder support system includes a first ladder support apparatus and a second ladder support apparatus.
  • the first ladder support apparatus has a first orientation configured to be secured to a first support leg of the set of support legs of the ladder.
  • the second ladder support apparatus has a second orientation configured to be secured to a second support leg of the set of support legs of the ladder.
  • the first orientation is mirrored relative to the second orientation.
  • the first ladder support apparatus and the second ladder support apparatus both include the above-discussed bracket, friction-reducing segment, and friction-inducing segment.
  • the friction-inducing segment is configured to interface with an underlying surface when the ladder support apparatus is in a default orientation relative to the underlying surface.
  • the friction- reducing segment is configured to interface with the underlying surface when the ladder support apparatus is in an angled orientation relative to the underlying surface.
  • Additional embodiments of the invention may be directed to a ladder having a ladder support apparatus permanently affixed thereto.
  • the ladder of these embodiments may be originally manufactured to include the above-discussed structures of the ladder support apparatus.
  • the ladder may be sold with the ladder support apparatus permanently secured thereto such as via welding or a chemical adhesive.
  • Fig. 1 is a perspective view of a ladder having a first embodiment of a ladder support system installed on two support legs of the ladder, shown from an upper side;
  • Fig. 2 is a perspective view of the ladder and ladder support system of Fig. 1 , shown from a lower side;
  • Fig. 3 is a side view of the ladder of Fig. 1 , shown in an angled orientation so as to allow mobility of the ladder;
  • Fig. 4 is a perspective view of a ladder support apparatus of embodiments of the invention, shown from an upper side;
  • Fig. 5 is a perspective view of the ladder support apparatus of Fig. 4, shown from a lower side and with a portion removed to illustrate a positioning segment;
  • Fig. 6 is an exploded view of the ladder support apparatus of Fig. 4;
  • Fig. 7 is a vertical cross-sectional view showing the ladder support apparatus secured to a foot of the ladder
  • Fig. 8 shows an alternative embodiment of the positioning segment
  • Fig. 9 shows a ladder having a second embodiment of a ladder support system installed on the support legs
  • Figs. 10A and 10B show an alternative embodiment of the ladder support apparatus having support rails
  • Fig. 1 1 shows an alternative embodiment of a securing fastener.
  • Fig. 1 an exemplary ladder utilizing embodiments of the invention is shown.
  • the ladder provides an exemplary field of use for various embodiments of the invention.
  • Other embodiments of the invention may be utilized in other fields of use.
  • Practically any object with legs, such as a table, stepstool, desk, or other furniture (not illustrated) can be utilized with various embodiments of the invention to allow for stability and mobility of the object. These various embodiments may thus be configured to allow for securing to the respective objects.
  • a ladder 12 may be commonly referred to as a step ladder.
  • a ladder 12 to which embodiments of the invention (as discussed below) are configured to be secured, may include a set of primary legs 14, a set of support legs 16, a set of step rungs 18, a set of support rungs 20, a set of spreaders 22, and a top cap 24.
  • Other ladders may include some combination of these structures, as well as other structures.
  • the primary legs 14 are spaced by the step rungs 18 as well as the top cap 24.
  • the step rungs 18 and the top cap 24 are secured to the primary legs 14 by fasteners 26.
  • the primary legs 14 each include a primary foot 28, configured to be placed on an underlying surface 30.
  • the support legs 16 are spaced by the support rungs 20 as well as the top cap 24.
  • the support rungs 20 and the top cap 24 are secured to the support legs 16 by fasteners 26.
  • the support legs 16 each include a support foot 32, configured to be placed on the underlying surface 30.
  • the support feet 32 are configured to be interfaced by the ladder support apparatus 10, as discussed in detail below.
  • the ladder 12 may be in a stowed configuration or a deployed configuration.
  • the ladder 12 of Figs. 1 -3 is shown in the deployed configuration.
  • the spreader 22 is secured so as to push the support legs 16 away from the primary legs 14.
  • the support legs 16 are typically secured to the top cap 24 via a pivotable fastener 34, such that the support legs 16 can be brought to substantially parallel with the primary legs 14 in the stowed configuration.
  • the spreader 22 may also include pivotable fasteners 34 as well as a lock 36 to keep the spreader 22 (and by extension, the entire ladder 12) in the deployed configuration.
  • the foot 32 of the support leg is shown in more detail in Fig. 7.
  • the foot 32 includes a flange 38 and a base 40 configured to fit over the support leg 16 of the ladder.
  • the flange 38 flares outward to increase a surface area of a floor pad 42 affixed to a bottom side of the base 40 of the foot 32.
  • the floor pad 42 is configured to interface with the underlying surface 30 (although embodiments of the invention will be placed between the floor pad 42 and the underlying surface 30).
  • the floor pad 42 of some embodiments includes recesses 44 configured to increase the friction with the underlying surface 30.
  • the floor pad 42 presents outer edges 46 to which embodiments of the invention will be secured, as discussed below. It should be appreciated that an inner channel 48 of the support leg 16 may be open for securing of the various embodiments of the invention, as discussed below.
  • the ladder support apparatus 10 discussed below may be configured for use with an A-frame type ladder (e.g., a 1A or 1AA step ladder).
  • the ladder support apparatus 10 may be used on a front step ladder, which includes steps on its front side (i.e. , extending between its primary legs 14) and support rungs 20 on its back side (i.e., extending between its support legs 16).
  • a front step ladder which includes steps on its front side (i.e. , extending between its primary legs 14) and support rungs 20 on its back side (i.e., extending between its support legs 16).
  • embodiments provide for the ladder support apparatus 10 to be universal, such that it may be used with various other ladder types (e.g., multipurpose ladders, extension ladders, articulated ladders, platform ladders, step stools, etc.).
  • the ladder support apparatus 10 may be configured to be used on ladders of various sizes, such as eight-, ten-, or twelve-foot ladders (or even larger/smaller ladders).
  • Figs. 3-6 an exemplary ladder support apparatus 10 is shown.
  • the ladder support apparatus 10 is configured to provide mobility and stability to the ladder 12.
  • the ladder support apparatus 10 provides mobility while the ladder 12 is tipped in a first orientation and provides stability while the ladder 12 is in a second orientation.
  • An example of the first orientation is shown in Fig. 3 in which the ladder 12 is angled relative to an underlying surface 30.
  • the mobility arrows of Fig. 3 show how the ladder 12 is mobile while in this orientation.
  • ladder support apparatus 10 is shown providing mobility of ladder 12 in a deployed configured in Fig. 3, it is understood that the mobility of ladder 12 described herein may also be achieved when the ladder 12 is in a partially or completely stowed configuration.
  • ladder support apparatus 10 also provides mobility (e.g., as shown with the mobility arrows of Fig. 3) while ladder 12 is tipped in a first orientation and in a partially or completely stowed configuration.
  • An example of the second orientation is shown in Figs. 1 and 2, in which the ladder 12 has all four legs flat against the underlying surface 30 (not directly illustrated).
  • the user can selectively switch between a mobile ladder 12 and a stable ladder 12 by altering the angle of the ladder 12 relative to an underlying surface 30.
  • the ladder support apparatus 10 comprises a bracket 100, a friction-reducing segment 102, and a friction- inducing segment 104.
  • the friction-reducing segment 102 and the friction-inducing segment 104 are each secured to the bracket 100.
  • the bracket 100 is configured to be secured to the ladder 12.
  • the bracket 100 thus secures the friction-reducing segment 102 and the friction-inducing segment 104 relative to the ladder 12 such that the friction- reducing segment 102 and the friction-inducing segment 104 may be selectively interfaced with the underlying surface 30 depending upon the above-discussed angle relative to the underlying surface 30.
  • the ladder support apparatus 10 may only comprise a bracket 100 and a friction-reducing segment 102. In other embodiments of the invention, the ladder support apparatus 10 may only comprise a bracket 100 and a friction-inducing segment 104.
  • the bracket 100 is configured to be secured to a leg of the ladder 12. More specifically, in some embodiments, the bracket 100 may be made of steel, fiberglass, carbon fiber, alloys, or other suitable resilient material, and is configured to be secured to a foot of the leg of the ladder 12. Even more specifically, in some embodiments, the bracket 100 is configured to be secured to a support foot 32 of a support leg 16 of the ladder 12. This is illustrated in Figs. 1-3.
  • the friction-inducing segment 104 is configured to interface with an underlying surface 30 when the ladder support apparatus 10 is in a default orientation relative to the underlying surface 30 (as in Figs. 1 -2).
  • the friction-reducing segment 102 is configured to interface with the underlying surface 30 when the ladder support apparatus 10 is in an angled orientation relative to the underlying surface 30 (as in Fig. 3).
  • the bracket 100 includes a ladder-securing segment 106 and structural-support segment 108.
  • the ladder-securing segment 106 is configured to fasten the ladder 12 to the ladder support apparatus 10.
  • the structural- support segment 108 is configured to keep the friction-inducing segment 104 and the friction-reducing segment 102 secured to and aligned with the bracket 100.
  • the structural- support segment 108 of the bracket 100 may include a lateral support plate 1 10, a first sidewall 112, and a second sidewall 1 14.
  • the ladder-securing segment 106 comprises a securing fastener 1 16 and an alignment plate 1 18.
  • the securing fastener 1 16 is configured to hold to exert a force of the foot 32 of the ladder 12.
  • the securing fastener 1 16 may selectively or permanently lock the ladder-support apparatus to the foot 32.
  • the securing fastener 1 16 may have any of numerous embodiments.
  • the securing fastener 1 16 includes a bolt 120 and an arm 122.
  • the arm 122 rises from the later support plate and/or the first sidewall 1 12.
  • the arm 122 includes a vertical segment 124 and a horizontal segment 126.
  • the bolt 120 extends from the horizontal segment 126 of the arm 122 so as to exert the force downward to push the foot 32 into the lateral support plate 1 10.
  • the user may thus tighten the bolt 120 onto the foot 32 of the ladder 12 (as shown in Fig. 1 ).
  • the user may secure the tightened bolt 120 using a locking nut (not illustrated) or other locking device.
  • the user may permanently secure the bolt 120 in the locked position.
  • mechanical pressure may be provided by a clamp.
  • mechanical pressure may be provided by a spring, such as a compression spring, an extension spring, a torsional spring, a leaf spring, a disc spring, or a constant- force spring.
  • mechanical pressure may be provided by another structure.
  • the securing may also be accomplished via a chemical adhesive, welding, or other permanent securement.
  • the alignment plate 1 18 extends upward from a lateral support plate 1 10.
  • the alignment plate 1 18 includes a wall 128 having side edges and a top edge.
  • the alignment plate 1 18 keeps the foot 32 of the ladder 12 aligned with the bracket 100. An edge of the foot 32 is placed against the wall of the alignment plate 1 18. Then, as the ladder support apparatus 10 is secured to the foot 32 by the above- discussed ladder-securing segment 106, the foot 32 remains in that orientation relative to the wall, as best shown in Fig. 7.
  • the alignment ensures that as the ladder 12 is tipped from the default orientation to the angled orientation, the interfacing switches from the friction-inducing segment 104 to the friction-reducing segment 102.
  • the arm 122 of the ladder-securing segment 106 is a secondary alignment plate 1 18.
  • the arm 122 also keeps the foot 32 aligned with the ladder-support apparatus.
  • the alignment plate 1 18 and the arm 122 may be disposed perpendicular such that the square- or -rectangular-shaped foot 32 may be in contact with two edge surfaces of the foot 32. This allows the securing of different sized foots for different size ladders, so long as the foot 32 is substantially square or rectangular.
  • additional alignment plate 1 18s may be utilized, such as a tertiary alignment plate 1 18 and a quaternary alignment plate 1 18. These additional alignment plate 1 18s may be selectively or permanently emplaced to secure the foot 32.
  • the lateral support plate 1 10 is configured to receive the foot 32 of the leg of the ladder 12 thereon.
  • the lateral support plate 1 10 is disposed horizontally, or substantially horizontally, in the default orientation.
  • the foot 32 is placed onto the lateral support plate 1 10 and aligned via the one or more alignment plate 1 18s discussed above.
  • the lateral support plate 1 10 supports the weight of the ladder 12 and the user thereon.
  • the first sidewall 112 extends downward (e.g. , generally towards the underlying surface 30) from the lateral support plate 1 10.
  • the second sidewall 1 14 also extends downward (e.g., generally towards the underlying surface 30) from the lateral support plate 1 10.
  • the first sidewall 1 12 and the second sidewall 1 14 provide structural stability for the lateral support plate 1 10.
  • the first sidewall 1 12 and the second sidewall 1 14 also may provide securing of the friction-reducing segment 102 and/or the friction-inducing segment 104.
  • the first sidewall 1 12 may be secured to the above-discussed arm 122 so as to keep the arm 122 stable relative to the other components of the bracket 100.
  • the friction-reducing segment 102 will now be discussed in more detail.
  • the friction-reducing segment 102 is secured to the bracket 100. As discussed above, the friction-reducing segment 102 is configured to interface with the underlying surface 30 when the ladder support apparatus 10 is in an angled orientation relative to the underlying surface 30, as best shown in Fig. 3. This allows the user to roll or slide the ladder 12 while the ladder 12 is in the angled orientation.
  • the friction-reducing segment 102 may include any of various friction-reducing materials or structures configured to allow this mobility.
  • the friction-reducing segment 102 includes a roller 130 rotatable about an axis running between the first sidewall 1 12 and the second sidewall 1 14.
  • the friction-reducing segment 102 may be comprised of Delrin®, other acetal homopo!ymer materials, or any other material that may present low-friction and/or high-wear resistance characteristics.
  • the roller 130 includes a cylindrical wheel 132 and an axle 134, as best shown in Fig. 6.
  • the cylindrical wheel 132 as shown in Fig. 6, may present a height (e.g., a height of the cylinder shape, which is a width when oriented horizontally) greater than its diameter.
  • the height of the cylinder may be at least twice the diameter, or at least three times the diameter.
  • the height of the cylinder keeps the ladder 12 laterally stable while the ladder 12 is in the angled orientation.
  • a plurality of wheels 132 may be utilized to provide this lateral stability. It should be appreciated, as illustrated in Fig. 1 and 2, that two ladder support apparatuses 10 may be used simultaneously on two support legs 16 of the ladder 12. As such, narrower rollers 130 may also be utilized because of the lateral support between two disparate rollers 130 on the respective ladder support apparatuses 10. [0044] As best shown in Fig.
  • the axle 134 is disposed through a first opening 136 in the first sidewall 1 12, through a central passageway 138 of the cylindrical wheel 132, and through a second opening 140 in the second sidewall 1 14.
  • the axle 134 allows the cylindrical wheel 132 to roll relative to the first sidewall 1 12 and the second sidewall 1 14.
  • the axle 134 may include a first endcap142 and a second endcap 144.
  • the first endcap 142 and the second endcap 144 keep the axle 134 secured around the first opening 136 and the second opening 140, respectively.
  • the second endcap 144 is a head of a bolt and the first endcap 142 is a nut secured to the bolt.
  • the rounded wall of the cylindrical wheel 132 may be locally friction-inducing (e.g., by the cylindrical wheel 132 being in contact with the underlying surface 30).
  • the overall friction between the ladder 12 and the underlying surface 30 is greatly reduced because the roller 130 allows the ladder 12 to move at a reduced friction.
  • the roller 130 enhances mobility of the ladder 12 by allowing the ladder 12 to roll relative to the underlying surface 30. It should also be appreciated that the roller 130 enhances mobility of the ladder 12 while the ladder 12 is in the stowed configuration discussed above.
  • the friction-inducing segment 104 is secured to the bracket 100, as best shown in Figs. 5 and 7.
  • the friction-inducing segment 104 is configured to interface with the underlying surface 30 when the ladder support apparatus 10 is in a default orientation relative to the underlying surface 30.
  • the default position is the position in which the user will climb the ladder 12 to perform any of various tasks.
  • On an A-frame ladder this is the default deployed orientation of the ladder 12, shown in Figs. 1 and 2.
  • the default deployed orientation typically will include the foot 32 horizontal and the support leg 16 extending at an angle therefrom, towards and at the same angle as the primary legs 14.
  • the friction-inducing segment 104 includes a frictional pad 146, best shown in Fig. 6.
  • the frictional pad 146 is formed of a substance selected to increase the friction between the ladder 12 and the underlying surface 30.
  • the frictional pad 146 is configured to reduce mobility of the ladder 12 when the ladder 12 is in the default orientation, such that the user may climb the ladder 12.
  • the frictional pad 146 presents a generally rectangular prism shape including a bottom, interfacing surface 148.
  • the bottom interfacing surface 148 is generally flat so as to maximize surface area in contact with the underlying surface 30.
  • the frictional pad 146 may also present a channel 150 (shown in Figs. 5 and 6) for mounting and/or aligning of the frictional pad 146.
  • the frictional pad 146 may further present beveled corners 152 against the interfacing surface 148 to reduce wear on corners of the interfacing surface 148.
  • the frictional pad 146 includes a mounting segment 154.
  • the mounting segment 154 is configured to secure the frictional pad 146 relative to the bracket 100.
  • the frictional pad 146 is secured to the lateral support plate 1 10.
  • the first sidewall 1 12 and second sidewall 1 14 of the bracket 100 may keep the frictional pad 146 aligned.
  • the frictional pad 146 may be secured to the first sidewall 1 12, the second sidewall 1 14, the alignment plate 1 18, or some portion of the bracket 100.
  • the mounting segment 154 may also present clips 156 configured to be secured to the channel 150 of the frictional pad 146.
  • the frictional pad 146 may be secured to the mounting segment 154 via various fasteners, chemical adhesives, or the like.
  • the frictional pad 146 is replaceable, such that the frictional pad 146 may be renewed upon the frictional pad 146 becoming worn or damaged. In this way, the user may keep the frictional pad 146 in good working order. This is in contrast with a standard foot 32, which is not replaceable or renewable.
  • the friction-inducing segment 104 (or the bracket 100) further includes a positioning segment 158.
  • the positioning segment 158 is configured to keep the frictional pad 146 at a set distance relative to the bracket 100.
  • the positioning segment 158 allows the user to customize the angle which is considered the angled orientation. By using the positioning segment 158 to position the frictional pad 146, the user can increase or reduce the angle at which the friction-reducing segment 102 will be in contact with the underlying surface 30 (as opposed to the friction-inducing segment 104 which is in contact at the default orientation).
  • the positioning segment 158 may also allow the ladder support apparatus 10 to be utilized with multiple different ladders (each having different orientations, foot sizes, and other distinctions).
  • the set distance, at which the positioning segment 158 keeps the frictional pad 146 relative to the bracket 100, is determined based at least in part on the angled orientation of the ladder 12.
  • the user may select the set distance by manipulating the positioning segment 158. In some embodiments, the user may do so through trial-and- error by testing the ladder 12 at various settings. In other embodiments, the user may select a certain setting or set distance on the positioning system based upon a known set distance for the specific type of ladder 12 to which the user is securing the ladder support apparatus 10.
  • the set distance is determined such that the roller 130 not only provides mobility in the angled orientation but also provides stability for the ladder 12.
  • the four legs 14, 16 of the ladder 12 on the underlying surface 30 will have the roller 130 in contact with the underlying surface 30. Then, the user will induce a slight forward movement until the frictional pad 146 makes contact with the underlying surface.
  • the user may position the positioning segment 158 such that the roller 130 is in contact until the forward movement places the frictional pad 146 in contact.
  • the positioning segment 158 includes a fastener 160 with helical protrusions (not directly illustrated) disposed at least partially through an opening 162 in the lateral support plate 1 10.
  • the opening 162 in the lateral support plate 1 10 may include a recess 164 configured to sink the fastener 160 such that a flat surface is presented for receipt of the foot 32 thereon.
  • the fastener 160 is associated with a nut 166 configured to keep the frictional pad 146 at said set distance.
  • the fastener 160 may be secured to the mounting segment via an opening 168 of the friction-inducing segment 104, such that rotation of the fastener 160 tightens or loosens the fastener 160 secured to the mounting segment.
  • the first sidewall 1 12 and the second sidewall 1 14 prevent the frictional pad 146 from rotating (as best shown in Fig. 5).
  • the ladder support system comprises two or more of the above-discussed ladder support apparatuses 10.
  • the ladder support system thus provides support and stability to two or more legs of the ladder 12.
  • the ladder 12, as discussed above, includes a set of primary legs 14 and a set of support legs 16.
  • a first ladder support apparatus 10 has a first orientation configured to be secured to a first support leg of the set of support legs 16 of the ladder 12.
  • a second ladder support apparatus 10 has a second orientation configured to be secured to a second support leg of the set of support legs 16 of the ladder 12.
  • the first orientation is horizontally mirrored relative to the second orientation. The mirroring of the first orientation and the second orientation allows the friction-reducing segments 102 to be disposed toward a rear side (e.g., away from the primary legs 14) of the ladder 12.
  • embodiments of the invention may sell a first ladder support apparatus 10 and a second ladder support apparatus 10 as a mirrored set.
  • Both the first ladder support apparatus 10 and said second ladder support apparatus 10 each include the bracket 100, the friction-reducing segment 102, and the friction-inducing segment 104.
  • the friction-inducing segment 104s of both ladder support apparatuses 10 are configured to interface with the underlying surface 30 when the ladder support apparatus 10 is in a default orientation relative to the underlying surface 30.
  • the ladder 12 will be supported by the two primary feet 28 under the primary legs 14 and the two friction-inducing segments 104 under the support legs 16.
  • the friction-reducing segments 102 are configured to interface with the underlying surface 30 when the ladder support apparatus 10 is in an angled orientation relative to the underlying surface 30.
  • the positioning element includes a pivoting plate 170 that is associated with a pin 172.
  • the pivoting plate pivots about the pin 172 and a pivot point 174.
  • the pin 172 is disposed between the first sidewall 1 12 and the second sidewall 1 14.
  • the pin 172 is secured such that the pivoting plate may move upward and downward in an arcing motion (as contrasted with the lateral motion of the embodiment of Fig. 5).
  • the pivoting plate 172 may help ensure that the interfacing side 148 of the frictional pad 146 remains fully in contact with the underlying surface 30 (of Fig. 3) when the ladder 12 is in the default orientation.
  • Figs. 9-1 1 depict an alternative embodiment of the ladder support apparatus 10.
  • Fig. 9 depicts the ladder 12 with the alternative embodiment of the ladder support apparatus 10 thereon.
  • the ladder support apparatus 10 of this embodiment may comprise a pair of support rails 202 (best shown in Figs. 10A and 10B) that, as will be described in more detail below, are configured to be fit over a portion of the support legs 16 of the ladder 12, so as to enhance mobility and to provide support and stability to the ladder 12.
  • the support rails 202 function to create a reinforced rigidness for the legs of the ladder 12, so as to reduce or eliminate flexing of the support legs 16 when the ladder 12 is in use.
  • each of the support rails 202 may be formed in the general shape of a structural channel (i.e. , a C-channel), with a longitudinal main web and a pair of flange sections extending laterally from opposing sides of the main web.
  • An upper end of each of the support rails 202 may be open.
  • a lower end of each of the support rails 202 may be closed to form a boot 204 for receiving a foot 32 of the support leg 16 of the ladder 12.
  • the ladder support apparatus 10 may include one or more rollers 206 secured to a bottom surface of the support rail boots 204.
  • the support rails 202 will be configured to fit or slide over a portion of the support legs 16 of the ladder 12, as shown in Fig. 1 1 .
  • the open channel of each of the support rails 202 is configured to fit around an exterior side, a back side, and a front side of one of the support legs 16 of the ladder 12.
  • Each foot 32 of the support legs 16 of the ladder 12 will fit down within the boot 204 of one of the support rails 202, and the support rail will extend upward along the support leg 16. The amount of upward extension will depend on a length of the support rail.
  • the support rail will be configured to extend just above the spreader 22, as shown in Fig. 9.
  • the support rails 202 may have varying lengths, but in some embodiments, the support rails 202 may be about six feet in length, so as to be capable of use with various sized ladders.
  • the inventive ladder support attachment is configured to be universal, such that the ladder support apparatus 10 can be used with generally any type of ladder type, ladder size, and/or ladder brand by sliding or otherwise positioning the ladder support apparatus 10 over the foot 32 of the support leg 16 of the ladder 12. .
  • Embodiments provide for the ladder support apparatus 10 to be used on a given ladder 12 such that a support rail is positioned on each of the support legs 16.
  • the ladder support apparatus 10 may implement various method of attachment.
  • each of the support rails 202 may include a plurality of tab 210 pairs spaced along the length of the support rail.
  • Fig. 1 1 only shows a single tab pair (with a single tab 210 extending from each flange section of the support rail), embodiments provide for the support rails 202 to include a plurality of tab pairs, such as shown in Figs. 10A-B.
  • each of the tabs 210 may include a through hole, through which a pin 212 may be inserted.
  • the through holes of the adjacent tab 210 pairs are aligned, such that a pin can be removably inserted through both of the tabs 210 of a give tab pair.
  • the pin 212 may be disposed against a support rung 20 of the ladder 12 as shown. It is also contemplated that pairs of ladder support apparatus 10 may be stored or transported together by means of removably and/or releasably securing corresponding tab 210 pairs to each other.
  • support rails 202 may be positioned adjacent one another such that through holes of corresponding tabs 210 of each ladder support apparatus 10 align so that the pin 212 may be removably inserted through both of the tabs 210 of separate ladder support apparatus 10 rails 202. In this manner, pairs of ladder support apparatus 10 may be releasably secured together to facilitate storage or transportation thereof.
  • the support rail can be positioned such that a lower tab pair is positioned directly above or below one of the lower, support rungs 20 of the ladder 12.
  • an upper tab pair can be positioned directly above or below one of the higher, back rungs of the ladder 12, as shown in Fig. 9. In some embodiments, the upper tab pair will be positioned directly above the spreader 22.
  • a pin 212 can then be inserted between the openings of each of the tab pairs so as to secure the support rails 202 in place on the support legs 16 of the ladder 12.
  • the tabs 210 may be located so as to secure the support rail from sliding along the leg of the ladder once a pin in inserted because of the placement of the tabs 210 in relation to upper and lower rungs of the ladder 12.
  • the tabs 210 may be oversized so as to include a plurality of through holes, so as to make securement to various styles and sizes of ladders more convenient.
  • the flange sections of the support rails 202 be formed with notches that can receive a pin.
  • through-holes may be formed directly through the flange sections.
  • sliding securement components may be secured on the support rails 202, such that the securement components can slide upward and downward along the slide rails 202 to necessary positions at which the securement components can be used to secure the support rails 202 to the support legs 16 of the ladder 12.
  • c-clamps, belts and latches, Velcro (e.g., hook and loop) straps, and other similar configurations of securement may be used.
  • the ladder support apparatus 10 is configured to reinforce the ladder 12 so as to provide additional support and stability.
  • the support rails 202 are configured to fit snugly over the support legs 16 of the ladder 12.
  • the support rails 202 function to create a reinforced rigidness for the legs of the ladder 12, so as to reduce or eliminate flexing of the support legs 16 when the ladder 12 is in use.
  • the interior surfaces of the support rails 202 will be in contact with the exterior surfaces of the support legs 16 of the ladder 12.
  • the ladder support apparatus 10 may include one or more shims 208, as shown in Fig. 8B, which can be inserted between the support rails 202 and the legs of the ladder 12 to ensure contact between the surfaces. Such shims 208 may, in some embodiments, be secured in place via the tabs 210.
  • the support rails 202 will generally be formed from a rigid material (e.g., Steel, Aluminum, Fiberglass, or the like), such that the support rails 202 can impart structural rigidity to the ladder 12.
  • the boot 204 which is positioned at the lower end of the support rail and is configured to retain a foot 32 of the support leg 16 of the ladder 12, can provide support and stability to the ladder 12 by having a larger width than the foot 32 of the support leg 16 of the ladder 12.
  • the flange sections of the support rail may be flared outward at the boot 204, such that a width of the support rail is larger at the boot 204 than at the portion of the support rail above the boot 204.
  • Such increased width provides for a broad base on which the ladder 12 can be supported, thereby increasing the support and stability of the ladder 12.
  • the flare may also promote universal use of embodiments of the invention with additional ladders that may have rubber feet or the like.
  • some embodiments provide for the boot 204 to extend somewhat rearwardly at an offset angle with respect to a general longitudinal direction of the support rail. Such rearward extension will provide a larger base for the overall ladder (i.e. , between the primary and support legs 16 of the ladder 12), thereby increasing the support and stability of the ladder 12.
  • the support rails 202 may include rollers 206 extending downward from the bottom surface of the boot 204.
  • the rollers 206 may be supported in position via a roller bracket that is rigidly secured to the boot 204.
  • the roller bracket may support one or more axles 134 about which the rollers 206 can rotate.
  • Embodiments of the present invention may include axles (e.g., a bolt and nut securing one or more rollers 206 to a roller 130 bracket 100) that are removable to facilitate replacement of rollers 206 that may become worn through use.
  • the ladder support apparatus 10 may include various numbers of rollers 206 on each support rail, such as one, two, or more rollers 206.
  • the rollers 206 may be formed from various material having sufficient strength and durability, such as Delrin. Embodiments of the present invention provide for such rollers 206 to be used to improve mobility of the ladder 12. Specifically, as the support rails 202 are secured to the support legs 16 of the ladder 12, the ladder 12 can be tilted rearward, such that the ladder 12 is fully supported by the rollers 206. In such an orientation, the ladder 12 can be easily maneuvered by rolling the ladder 12 on the ground surface via the rollers 206.
  • a set of anchors 214 may be disposed on the rail 202.
  • the anchors 214 are each configured to support a security strap 216 between the respective primary leg 14 and the support leg 16 of the ladder 12.
  • the anchors 214 provide an opening to which the security strap 216 may be secured.
  • the security strap 216 may then be secured to the primary leg 16 such as by wrapping around the primary leg 16 and securing the security strap 216 to itself (not directly illustrated).
  • the security strap 216 may be a ratchet strap, an elastic strap, or other adjustable strap.
  • the security strap 216 relieves or reduces strain on the spreader 22. The reduced strain will reduce the likelihood and severity of failures at the spreader 22. Absent the security strap 216, a failure at the spreader 22 could cause the ladder to collapse and injure the user. It should also be appreciated that the security strap 216 and/or the anchors 214 may be used in combination with any of the above-discussed embodiment of the invention.
  • references to “one embodiment,” “an embodiment,” or “embodiments” mean that the feature or features being referred to are included in at least one embodiment of the technology.
  • references to “one embodiment,” “an embodiment,” or“embodiments” in this description do not necessarily refer to the same embodiment and are also not mutually exclusive unless so stated and/or except as will be readily apparent to those skilled in the art from the description.
  • a feature, structure, act, etc. described in one embodiment may also be included in other embodiments, but is not necessarily included.
  • the current technology can include a variety of combinations and/or integrations of the embodiments described herein.
  • the terms “comprises,” “comprising,” “includes,” “including,” “has,” “having” or any other variation thereof, are intended to cover a non-exclusive inclusion.
  • a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)

Abstract

L'invention concerne un appareil support d'échelle qui fournit un support et une stabilité à une échelle. L'appareil support d'échelle comprend une patte de fixation, un segment de réduction de frottement et un segment induisant un frottement. La patte de fixation est configurée pour être fixée à un pied de l'échelle. Le segment induisant un frottement est fixé à la patte de fixation et configuré pour s'interfacer avec une surface sous-jacente lorsque l'appareil support d'échelle se trouve dans une orientation par défaut par rapport à la surface sous-jacente. Le segment de réduction de frottement est fixé à la patte de fixation et configuré pour s'interfacer avec la surface sous-jacente lorsque l'appareil support d'échelle se trouve dans une orientation inclinée par rapport à la surface sous-jacente.
PCT/US2019/066291 2018-12-13 2019-12-13 Appareil support d'échelle WO2020123981A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US17/413,309 US20220018189A1 (en) 2018-12-13 2019-12-13 Ladder support apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201862779134P 2018-12-13 2018-12-13
US62/779,134 2018-12-13

Publications (1)

Publication Number Publication Date
WO2020123981A1 true WO2020123981A1 (fr) 2020-06-18

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PCT/US2019/066291 WO2020123981A1 (fr) 2018-12-13 2019-12-13 Appareil support d'échelle

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US (1) US20220018189A1 (fr)
WO (1) WO2020123981A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11560755B1 (en) * 2020-01-15 2023-01-24 Yakov I. Kuzmin Ladder moving mechanism

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160024844A1 (en) * 2013-07-23 2016-01-28 Dale Martin Neubauer Safety ladder and work platform for helicopter and aircraft maintenence
US20160348436A1 (en) * 2015-05-28 2016-12-01 Eutimio Reyes Mobile Ladder Support Assembly
GB2556327A (en) * 2016-08-31 2018-05-30 Theobald Darchiville Martin Universal eye bolt actuated leveller and extendable stabiliser system for ladders and small deck structures
CN108756715A (zh) * 2018-06-04 2018-11-06 芜湖明智自动化科技有限公司 一种非标自动化用人字梯

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160024844A1 (en) * 2013-07-23 2016-01-28 Dale Martin Neubauer Safety ladder and work platform for helicopter and aircraft maintenence
US20160348436A1 (en) * 2015-05-28 2016-12-01 Eutimio Reyes Mobile Ladder Support Assembly
GB2556327A (en) * 2016-08-31 2018-05-30 Theobald Darchiville Martin Universal eye bolt actuated leveller and extendable stabiliser system for ladders and small deck structures
CN108756715A (zh) * 2018-06-04 2018-11-06 芜湖明智自动化科技有限公司 一种非标自动化用人字梯

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